About two months ago, I introduced three guppies to one of my ten gallon tanks (not the one mentioned above). These guppies are the suspected carriers of the dreaded camallanus worms. All three guppies began exhibiting symptoms, before I saw the worms protruding from their vents. By then I had already shared water and tools between tanks (like an idiot) and both of my ten gallons were likely infected. Eventually, the guppies passed away despite frequent feedings of food with fenbendazole, leaving behind a gazillion fry. Thinking the disease was vanquished, I went back to normal.

Just yesterday I saw worms protruding from the vent of one of my bettas, and today he died. His tank is empty, but I am fairly sure that my other tank is also infected, due to the contagious-ness of these devil worms. The only symptoms I've seen are minor fin tears and swollen stomach on the betta in the remaining tank.

I'm feeding medicated food today, and hoping for the best. Is there anything I can do? What about the guppy fry? Can ghost shrimp act as an intermediate host? Can the ADFs contract the worms?